Turkey considers the Kurdish Democratic Union Party (PYD) in Syria and its armed wing, the Kurdish People's Protection Units (YPG), to be "terrorist groups" with ties to the banned Kurdistan Workers' Party (PKK).

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The PKK has waged a decades-long armed fight against the Turkish state that has killed tens of thousands of people.

The arrest came after Turkey called on the Czech Republic to arrest the former co-leader and sent warrants for his arrest to Prague, Turkish officials said.

The Turkish interior ministry had offered a bounty of nearly $1m on Muslim, who is listed as one of the "most wanted terrorists" in Turkey.

Muslim will be produced before a court, the officials said, adding Czech authorities would decide whether or not he would be remanded in custody.

Turkish security officials and the justice ministry have begun the administrative process for the extradition of Muslim.

Turkey - together with the Free Syrian Army (FSA) rebel group - last month launched an air and ground offensive into Afrin in the northwest of Syria to vanquish the US-backed YPG fighters near its border.